Anti-rolling device for ships



y 1, 1967 N. x. STEPHANOU 3,330,241

ANTI-ROLLING DEVICE FOR SHIPS Filed May 20, 1966 2 Sheefs-Sheet 1I/RESISTING POINT IN VEN TOR.

TOWED ABREAST July 11, 1967 N. x. STEPHANOU ANTI-ROLLING DEVICE FORSHIPS 2 Sheets-Sheet Filed May 20, 1966 95 4mm 1? P N\ N aw nw ww N1 MNINVENTOR.

M'c/m/as J! Step/lanai! United States Patent 3,330,241 ANTI-ROLLINGDEVICE FOR SHIPS Nicholas X. Stephanou, SS Pholegandros, GlobalChartering Co., 29 Broadway, New York, N.Y. 10001 Filed May 20, 1966,Ser. No. 551,756 Claims. (Cl. 114-126) This invention relates tosubmersible marine stabilizers, and more particularly to an anti-rollingdevice for ships.

It is therefore the main purpose of this invention to provide ananti-rolling device for ships which will operate smoothly toconsiderably rolling action of a ship without exerting any jerking orturning action on said ship.

Another object of this invention is to provide an antirolling device forships adapted to move in accordance with the speed of a ship withoutweaving and without objectionable drag on said ship.

Another object of this invention is to provide an antirolling device forships, each side of said ship being provided with at least onestabilizing unit connected to said ship by means of a suspension cableor a tow-line in such a manner that it may be conveniently extendedoutwardly from said ship or pulled into said ship.

Still another object of this invention is to provide an anti-rollingdevice for ships which is easy to manufacture, and installed within aship, capable of making the ship more sea worthy, reduces repair andmaintenance costs on a ship due to storms and high seas, and providesmaximum utility to its users.

Other objects and advantages of this invention will become apparent froma consideration of the following detailed description taken inconnection with the accompanying drawing, wherein a satisfactoryembodiment of the invention is shown. However, it is to be understoodthat the invention is not limited to the details disclosed but includesall such variations and modifications as fall Within the spirit of theinvention and the scope of the appended claims.

In the drawing:

FIGURE 1 is a schematic diagram illustrating the geometrical principlesinvolved in this invention.

FIGURE 2 is a front elevational view of a ship sailing a calm sea withthe anti-rolling devices positioned outwardly.

FIGURE 3 is a side elevational view of a ship illustrating of how thestabilizing units are towed.

FIGURE 4 is a front elevational view of a ship in a rough sea, showingthe stabilizing units in their operating condition.

FIGURE 5 is a sectional-elevational view showing storage capacity forthe stabilizing units and winches.

FIGURE 6 is a sectional-elevational view of stabilizing pillar showinghydraulic control of its movable beam.

FIGURE 7 is a side elevational view taken along lines 7--7 of FIGURE 6.

FIGURE 8 is a perspective view of the stabilizing unit.

According to this invention, an anti-rolling device for ships 10 is usedfor stabilizing a ship 11. Starboard and port sides of the ship 11 areprovided with winch units 12 and 13. A tow line 14 is secured to thewinch unit 12 and is adapted to extend upwardly towards the pulley 18,which is rotatably secured on the movable beam 19 of a stabilizingpillar 16. Beam 19 is vertically positioned within pillar 16 by means ofa hydraulic piston 20. The bottom portion of pillar 16 is suitablysecured on the 3,330,241 Patented July 11, 1967 port side of the ship.Tow line 14 extends through pulley 18 and its end portion 14' issuitably secured to the stabilizing unit 21. On the starboard side ofship 11 a winch unit 13 supports the tow line 15 and rotatably securesit to the pulley 18 of a stabilizing pillar 17. It should be noted thatpillar 17 is of identical construction as pillar 16 thereby permittingthe tow line 15 to outwardly extend and be secured to the stabilizingunit 21 at 15'.

Looking now at FIGURE 5 of the drawing, one will see that in order toprevent any of the stabilizing units to drag behind the ship or to sinktoo deep into the water an auxiliary tow line 22 having a loop 23maintains the tow line 15 (or 14) in parallel with the hull of ship 11.Each stabilizing unit 21 is provided with a pair of heavy duty fins 22and 23 which are coplanar to each other and may be positioned at adesired depth or distance by means of expandable or retractable tow line15 (or 14). During the lifting process of one of said stabilizing units21 into the ship 11, auxiliary tow line 22 may be also used forpositioning said unit within the ship board. Auxiliary tow line 22 maybe extended by means of pulley 24 and an auxiliary winch unit 25 (seeFIGURE 5).

It will also be noted that the height of pillars 16 and 17 is adjustablein relation of the position of the center of gravity of a ship therebycausing both stabilizing units 21 to resist the ships rolling due toswell.

What I now claim is:

1. An anti-rolling device for ships comprising, in combination, anupwardly extendable pillar having a movable beam secured to each side ofa ship, a winch unit near said each pillar, a tow line secured to saidwinch unit, a pulley secured to the movable beam, said pulley adapted toprovide means for carrying said tow line in accordance with theoperation of said stabilizer unit, a stabilizer unit secured to the freeend of said tow line, said stabilizer unit when positioned in the waterat a pre-determined distance from said ship is adapted to reduce therolling action of said ship when it is used in conjunction with saidsubstantially identical stabilizer unit positioned off the opposite sideof said ship, and an auxiliary tow line arrangement flexibly secured tosaid tow line for controlling the movements of said stabilizer unit.

2. The combination according to claim 1, and a hydraulic piston membermovably secured within the lower portion of said pillar for providingvertical propulsion to said beam.

3. The combination according to claim 1, wherein said stabilizer unit isprovided with a pair of heavy duty fin members co-planar to each other,and said fin members being provided with means for admitting said freeend of said tow line therebetween.

4. The combination according to claim 1, wherein said auxiliary tow lineis provided with a loop adapted to flexibly move said tow line, and anauxiliary winch unit within said ship for expanding said auxiliary towline.

5. The combination according to claim 4, wherein an auxiliary pulleyunit is provided within said ship for carrying said auxiliary tow linein accordance with the operations of said auxiliary winch unit.

No references cited.

MILTON BUCI-ILER, Primary Examiner. T. M. BLIX, Assistant Examiner.

1. AN ANTI-ROLLING DEVICE FOR SHIPS COMPRISING, IN COMBINATION, ANUPWARDLY EXTENDABLE PILLAR HAVING A MOVABLE BEAM SECURED TO EACH SIDE OFA SHIP, A WINCH UNIT NEAR SAID EACH PILLAR, A TOW LINE SECURED TO SAIDWINCH UNIT, A PULLEY SECURED TO THE MOVABLE BEAM, SAID PULLEY ADAPTED TOPROVIDE MEANS FOR CARRYING SAID TOW LINE IN ACCORDANCE WITH THEOPERATION OF SAID STABILIZER UNIT, A STABILIZER UNIT SECURED TO THE FREEEND OF SAID TOW LINE, SAID STABILIZER UNIT WHEN POSITIONED IN THE WATERAT A PRE-DETERMINED DISTANCE FROM SAID SHIP IS ADAPTED TO REDUCE THEROLLING ACTION OF SAID SHIP WHEN IT IS USED IN CONJUNCTION WITH SAIDSUBSTANTIALLY IDENTICAL STABILIZER UNIT POSITIONED OFF THE OPPOSITE SIDEOF SAID SHIP, AND AN AUXILIARY TOW LINE ARRANGEMENT FLEXIBLY SECURED TOSAID TOW LINE FOR CONTROLLING THE MOVEMENTS OF SAID STABILIZER UNIT.